DESCRIPTION

You shouldn't call a method as a function, e.g. UNIVERSAL::isa($o, 'ARRAY'). It's considered harmful, because such code doesn't call overridden methods in any classes. This pragmatic module produces warnings if methods are called as functions. Here, methods are subroutines declared with the :method attribute.

This module scans the compiled syntax tree, checks function calls and produces warnings when dangerous function calls are detected. All the processes finish in compile time, so this module has no effect on run-time behavior.

The UNIVERSAL::isa and UNIVERSAL::can distributions are modules based on the same concept, but they produce warnings at run time.

INTERFACE

use warnings::method or use warnings::method -lexical

Installs the method check routine with lexical scope.

Note that the lexicality is limited before 5.10.0.

use warnings::method -global

Installs the method check routine with global scope, where this pragma checks all programs.

use/no warnings 'syntax';

Enables/Disables the method check routine.

Note that the syntax warning is defined by default, so you can always use it even if warnings::method is not loaded.

DEPENDENCIES

Perl 5.8.1 or later, and a C compiler.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests to bug-warnings-method@rt.cpan.org/, or through the web interface at http://rt.cpan.org/.